void
systemd_logind_release_fd(int _major, int _minor)
{
struct systemd_logind_info *info = &logind_info;
InputInfoPtr pInfo;
DBusError error;
DBusMessage *msg = NULL;
DBusMessage *reply = NULL;
dbus_int32_t major = _major;
dbus_int32_t minor = _minor;
int matches = 0;
if (!info->session || major == 0)
return;
/* Only release the fd if there is only 1 InputInfo left for this major
* and minor, otherwise other InputInfo's are still referencing the fd. */
pInfo = systemd_logind_find_info_ptr_by_devnum(xf86InputDevs, major, minor);
while (pInfo) {
matches++;
pInfo = systemd_logind_find_info_ptr_by_devnum(pInfo->next, major, minor);
}
if (matches > 1) {
LogMessage(X_INFO, "systemd-logind: not releasing fd for %u:%u, still in use\n", major, minor);
return;
}
LogMessage(X_INFO, "systemd-logind: releasing fd for %u:%u\n", major, minor);
dbus_error_init(&error);
msg = dbus_message_new_method_call("org.freedesktop.login1", info->session,
"org.freedesktop.login1.Session", "ReleaseDevice");
if (!msg) {
LogMessage(X_ERROR, "systemd-logind: out of memory\n");
goto cleanup;
}
if (!dbus_message_append_args(msg, DBUS_TYPE_UINT32, &major,
DBUS_TYPE_UINT32, &minor,
DBUS_TYPE_INVALID)) {
LogMessage(X_ERROR, "systemd-logind: out of memory\n");
goto cleanup;
}
reply = dbus_connection_send_with_reply_and_block(info->conn, msg,
DBUS_TIMEOUT, &error);
if (!reply)
LogMessage(X_ERROR, "systemd-logind: failed to release device: %s\n",
error.message);
cleanup:
if (msg)
dbus_message_unref(msg);
if (reply)
dbus_message_unref(reply);
dbus_error_free(&error);
}
static void
systemd_logind_set_input_fd_for_all_devs(int major, int minor, int fd,
Bool enable)
{
InputInfoPtr pInfo;
pInfo = systemd_logind_find_info_ptr_by_devnum(xf86InputDevs, major, minor);
while (pInfo) {
pInfo->fd = fd;
pInfo->options = xf86ReplaceIntOption(pInfo->options, "fd", fd);
if (enable)
xf86EnableInputDeviceForVTSwitch(pInfo);
pInfo = systemd_logind_find_info_ptr_by_devnum(pInfo->next, major, minor);
}
}
int
systemd_logind_take_fd(int _major, int _minor, const char *path,
Bool *paused_ret)
{
struct systemd_logind_info *info = &logind_info;
InputInfoPtr pInfo;
DBusError error;
DBusMessage *msg = NULL;
DBusMessage *reply = NULL;
dbus_int32_t major = _major;
dbus_int32_t minor = _minor;
dbus_bool_t paused;
int fd = -1;
if (!info->session || major == 0)
return -1;
/* logind does not support mouse devs (with evdev we don't need them) */
if (strstr(path, "mouse"))
return -1;
/* Check if we already have an InputInfo entry with this major, minor
* (shared device-nodes happen ie with Wacom tablets). */
pInfo = systemd_logind_find_info_ptr_by_devnum(xf86InputDevs, major, minor);
if (pInfo) {
LogMessage(X_INFO, "systemd-logind: returning pre-existing fd for %s %u:%u\n",
path, major, minor);
*paused_ret = FALSE;
return pInfo->fd;
}
dbus_error_init(&error);
msg = dbus_message_new_method_call("org.freedesktop.login1", info->session,
"org.freedesktop.login1.Session", "TakeDevice");
if (!msg) {
LogMessage(X_ERROR, "systemd-logind: out of memory\n");
goto cleanup;
}
if (!dbus_message_append_args(msg, DBUS_TYPE_UINT32, &major,
DBUS_TYPE_UINT32, &minor,
DBUS_TYPE_INVALID)) {
LogMessage(X_ERROR, "systemd-logind: out of memory\n");
goto cleanup;
}
reply = dbus_connection_send_with_reply_and_block(info->conn, msg,
DBUS_TIMEOUT, &error);
if (!reply) {
LogMessage(X_ERROR, "systemd-logind: failed to take device %s: %s\n",
path, error.message);
goto cleanup;
}
if (!dbus_message_get_args(reply, &error,
DBUS_TYPE_UNIX_FD, &fd,
DBUS_TYPE_BOOLEAN, &paused,
DBUS_TYPE_INVALID)) {
LogMessage(X_ERROR, "systemd-logind: TakeDevice %s: %s\n",
path, error.message);
goto cleanup;
}
*paused_ret = paused;
LogMessage(X_INFO, "systemd-logind: got fd for %s %u:%u fd %d paused %d\n",
path, major, minor, fd, paused);
cleanup:
if (msg)
dbus_message_unref(msg);
if (reply)
dbus_message_unref(reply);
dbus_error_free(&error);
return fd;
}
static DBusHandlerResult
message_filter(DBusConnection * connection, DBusMessage * message, void *data)
{
struct systemd_logind_info *info = data;
struct xf86_platform_device *pdev = NULL;
InputInfoPtr pInfo = NULL;
int ack = 0, pause = 0, fd = -1;
DBusError error;
dbus_int32_t major, minor;
char *pause_str;
dbus_error_init(&error);
if (dbus_message_is_signal(message,
"org.freedesktop.DBus", "NameOwnerChanged")) {
char *name, *old_owner, *new_owner;
dbus_message_get_args(message, &error,
DBUS_TYPE_STRING, &name,
DBUS_TYPE_STRING, &old_owner,
DBUS_TYPE_STRING, &new_owner, DBUS_TYPE_INVALID);
if (dbus_error_is_set(&error)) {
LogMessage(X_ERROR, "systemd-logind: NameOwnerChanged: %s\n",
error.message);
dbus_error_free(&error);
return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
}
if (name && strcmp(name, "org.freedesktop.login1") == 0)
FatalError("systemd-logind disappeared (stopped/restarted?)\n");
return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
}
if (strcmp(dbus_message_get_path(message), info->session) != 0)
return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
if (dbus_message_is_signal(message, "org.freedesktop.login1.Session",
"PauseDevice")) {
if (!dbus_message_get_args(message, &error,
DBUS_TYPE_UINT32, &major,
DBUS_TYPE_UINT32, &minor,
DBUS_TYPE_STRING, &pause_str,
DBUS_TYPE_INVALID)) {
LogMessage(X_ERROR, "systemd-logind: PauseDevice: %s\n",
error.message);
dbus_error_free(&error);
return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
}
if (strcmp(pause_str, "pause") == 0) {
pause = 1;
ack = 1;
}
else if (strcmp(pause_str, "force") == 0) {
pause = 1;
}
else if (strcmp(pause_str, "gone") == 0) {
/* Device removal is handled through udev */
return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
}
else {
LogMessage(X_WARNING, "systemd-logind: unknown pause type: %s\n",
pause_str);
return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
}
}
else if (dbus_message_is_signal(message, "org.freedesktop.login1.Session",
"ResumeDevice")) {
if (!dbus_message_get_args(message, &error,
DBUS_TYPE_UINT32, &major,
DBUS_TYPE_UINT32, &minor,
DBUS_TYPE_UNIX_FD, &fd,
DBUS_TYPE_INVALID)) {
LogMessage(X_ERROR, "systemd-logind: ResumeDevice: %s\n",
error.message);
dbus_error_free(&error);
return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
}
} else
return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
LogMessage(X_INFO, "systemd-logind: got %s for %u:%u\n",
pause ? "pause" : "resume", major, minor);
pdev = xf86_find_platform_device_by_devnum(major, minor);
if (!pdev)
pInfo = systemd_logind_find_info_ptr_by_devnum(xf86InputDevs,
major, minor);
if (!pdev && !pInfo) {
LogMessage(X_WARNING, "systemd-logind: could not find dev %u:%u\n",
major, minor);
return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
}
if (pause) {
/* Our VT_PROCESS usage guarantees we've already given up the vt */
info->active = info->vt_active = FALSE;
/* Note the actual vtleave has already been handled by xf86Events.c */
if (pdev)
pdev->flags |= XF86_PDEV_PAUSED;
else {
close(pInfo->fd);
systemd_logind_set_input_fd_for_all_devs(major, minor, -1, FALSE);
}
if (ack)
systemd_logind_ack_pause(info, major, minor);
}
else {
/* info->vt_active gets set by systemd_logind_vtenter() */
info->active = TRUE;
if (pdev)
pdev->flags &= ~XF86_PDEV_PAUSED;
else
systemd_logind_set_input_fd_for_all_devs(major, minor, fd,
info->vt_active);
/* Always call vtenter(), in case there are only legacy video devs */
systemd_logind_vtenter();
}
return DBUS_HANDLER_RESULT_HANDLED;
}
